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Our Flickr photo contest. is a good example of this philosophy in action; we could have held the contest behind closed doors and made people sign up in order to submit and view photos. I routinely bookmark and comment on environmental news, green blogs, and stories about sustainability and alternative energy technology.
Care2 provides visitors to their site green-living advice and the opportunity to act on behalf of the causes they care most about. By getting people to share through online items that would become viral, like e-cards, petitions, contests, and so on, Care2 was able to and continues to grow its community; the proof is in their membership of 15.9
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